Angles part 1

I know if a equation equal to 90 or 180 degrees because 180 is a supplementary because it has a strait line in the button and a middle diagonal line on your left and I know when it is equal to 90 because it is a complimentary and it has a strait line on your left and the bottom and a diagonal line at your right. Vertical angles because they are congruent. Yes we are solving these problems to find x. Congruent means angles that are the same. Vertical angles are congruent because the line are equal. Complementary angles are not congruent. No supplementary angles are not congruent. The other angles that are congruent is vertical, and alternate exterior.